Explain why cos (x) = sin (90-x) for x such that 0

If M=5x^2+7x-4 and N=-3x^2-4x+5, then M-N equals

Which equation has a slope of 2/3 and a y-intercept of 2

A line passes through (1,-1) and (3,5). What is the equation of the line in slope-intercept form? A.) Y = x-2 B.) Y = 3x-5 C.) Y = 3x-4 D.) Y = 2x-3

There are 17 students in Mr. K's math class. On the last test 2 students failed the test (D or F). What percent of the class passed the test (C, B, or A) ? % rounded to nearest 10th

2x + y = - 1 Can someone tell me how to graph this?

A cone has a height of 2.5 in. and a radius of 5 in. What is the volume of the cone? (Use 3.14 for pi. Round the answer to two decimal places.) 32.71 in3 65.42 in3 196.25 in3 588.75 in3

This is how we know were in a pandemic. When the BMX bike company starts selling toilet paper for $7.

If p, q are zeroes of polynomial f (x) = 2x^2-7x+3, find the value of p^2+q^2

Suppose $x$,$y$, and $z$ form a geometric sequence. if you know that $x+y+z=18$ and $x^2+y^2+z^2=612$, find the value of $y$.

A manager checked production records and found that a worker produced 160 units while working 40 hours. In the previous week, the same worker produced 138 units while working 36 hours.